DNS Server¶
DNS Server is a simple DNS server that forwards all DNS queries to the master DNS server(-s) and sends responses back to clients. It can read DNS zones from the Zone Files ( http://en.wikipedia.org/wiki/Zone_file ) listed in domains configuration file (see DNSDomainsFile option below). DNS Server uses a list of allowed domains. All DNS requests for other domains are rejected. You can block specific IP addresses (or ranges of IP addresses) from accessing DNS Server. This program usually used to protect the real DNS server from attacks. It is very fast and can handle large number of simultaneous connections.
Supported OS: Windows XP, Windows Vista, Windows 7, Windows 8.
Installation¶
To install DNS Server just unzip dnsserver.zip somewhere on your hard drive.
Usage¶
DNSServer.exe [-logfile filename] [-cfgfile dnscfg.ini]
Optional command-line parameters:
-logfile filename
It allows to specify log’s filename. Default output: to screen.
-cfgfile dnscfg.ini
The path to the configuration file (see Configuration section below). Default configuration file name: dnscfg.ini.
Configuration¶
The format for an entry in the configuration file is Option=Value. Entries in the configuration file can appear in any order.
All of the possible entries in the configuration file are listed below.
Log¶
Would you like to save the log to file. Possible values: Yes, No, Overwrite. Default: No.
FromIP¶
Send requests to the master DNS server from this IP. Default: Any. Example:
FromIP=192.168.0.1
AllowedUrl¶
Load the list of allowed domains from URL. Example:
AllowedUrl=http://127.0.0.1/allowed.php
AllowedUrlX¶
X is a number between 1 and 9. You can specify up to 9 allowed domains URLs. Example:
AllowedUrl1=http://127.0.0.1/allowed1.php
AllowedUrl2=http://127.0.0.1/allowed2.php
AllowedUrl3=http://127.0.0.1/allowed3.php
AllowExternalDomains¶
Allow DNS requests for the domains that are not present in allowed domains list. Possible values: Yes, No. Default: No. Example:
AllowExternalDomains=no
ReloadSeconds¶
Reload the allowed domains every X seconds. Default: 0 - don’t reload. Example:
ReloadSeconds=60
AllowFrom¶
The list of IP addresses that are allowed access. Example:
AllowFrom=127.0.0.1,192.168.0.1
You can specify the range of allowed IP addresses using CIDR, for example: 127.0.0.0/24
AllowFromFile¶
Read the list of allowed IP addresses/ranges from file. Example:
AllowFromFile=allowfrom.txt
DenyFrom¶
The list of IP addresses that are denied access. Example:
DenyFrom=10.10.8.8,10.10.8.9
You can specify the range of denied IP addresses using CIDR, for example: 10.0.0.0/8
DenyFromFile¶
Read the list of denied IP addresses/ranges from file. Example:
DenyFromFile=denyfrom.txt
AllowDenyOrder¶
Tells DNS Server the order of processing AllowFrom and DenyFrom rules.
Possible values are:
Deny,Allow- if the client does not match DenyFrom rule or it does match AllowFrom rule, then it will be granted access. This is the default order.Allow,Deny- if the client does not match AllowFrom rule or it does match DenyFrom rule, then the client will be denied access.
Example:
AllowDenyOrder=Deny,Allow
DNSCacheTTL¶
“Time to live” (in seconds) of the internal DNS records cache. Default: 0 (don’t use cache). Example:
DNSCacheTTL=10
DNSDomainsFile¶
The path to the list of domain zones (Domains File). Each line in the Domains File contains zone name and the path to the Zone File ( http://en.wikipedia.org/wiki/Zone_file ), delimited by comma, semicolon or equal sign. Path to the Zone File can be enclosed in quotes. It can be absolute path or the path relative to the directory where Domains File resides.
Example:
DNSDomainsFile=c:\temp\dns\domains.txt